Phthalic Isophthalic Anhydride Precursor
Isophthalic acid serving as precursor for mixed phthalic-isophthalic anhydride in alkyd resin production. Classified specifically as isophthalic acid under 2917.39.1500 before anhydride formation. Used in industrial paints and varnishes.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If converted to phthalic anhydride
Anhydrides have separate subheading from parent acids.
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Import Tips & Compliance
• Specify anhydride reaction yield expectations in end-use documentation
• Monitor for decarboxylation impurities affecting anhydride quality
• Ensure acid number specification (≥670 mg KOH/g) met
Related Products under HTS 2917.39.15.00
Isophthalic Acid (99% purity)
Isophthalic acid is a meta-isomer of benzene-1,3-dicarboxylic acid, a chemically defined aromatic polycarboxylic acid used primarily in resin production. It falls under HTS 2917.39.1500 as a separate aromatic polycarboxylic acid, specifically isophthalic acid, meeting Chapter 29 note (a). Typically supplied as white crystalline powder for industrial synthesis.
Industrial Grade Isophthalic Acid
Technical grade isophthalic acid (IPA) for PET resin copolymer production and unsaturated polyester resins. Classified under 2917.39.1500 as pure isophthalic acid per Chapter 29 definitions. Supplied in 25kg bags or 1MT supersacks for chemical manufacturing.
Purified Isophthalic Acid (PIA)
High-purity isophthalic acid (>99.8%) produced via cyclohexane oxidation process, used in high-performance coatings and specialty polyesters. Meets HTS 2917.39.1500 criteria as chemically defined aromatic dicarboxylic acid. Essential comonomer for PET bottle resins.
Isophthalic Acid Flakes
Isophthalic acid processed into uniform flakes for improved handling and dissolution in polyester reactors. Still classified as pure isophthalic acid under 2917.39.1500 since physical form doesn't affect chemical classification. Used in coil coatings and gelcoats.
Isophthalic Acid for Unsaturated Polyester Resins
Specialty grade isophthalic acid formulated for corrosion-resistant unsaturated polyester resins used in fiberglass reinforced plastics. Pure chemical compound classification under HTS 2917.39.1500 per Chapter 29 note (a). Key for chemical storage tanks and pipes.
Isophthalic Acid with Stabilizer
Isophthalic acid containing minimal oxidation stabilizer for transport stability, permitted under Chapter 29 note (f). Still classified as isophthalic acid HTS 2917.39.1500 when stabilizer is solely for preservation. For long-distance chemical shipments.